Inner tube



J. B. MUNDELL.

INNER TUBE.

APPLICATION FILED MAR 28, 192i.

Patented Dec. 12,1922

31E v CIR J7 EsB/Vwv DELZJ.

Patented Dec. 12. 192.2.

UNITED STA;

' JAMES B. moment, or CHICAGO, ILLINOIS.

INNER TUBE.

Application filed March 28, 192i. serial No. 456,348.

numerals of reference marked thereon,

which form a part of this specification.

This invention relates to an improved type of an inner tube for tire casings, said tubebeing divided by partitions radiating from the inner periphery and dividing the interior of the tube into independent endless chambers all of'which are adapted to be simultaneously inflated by a single valve mechanism.

It is an object of this invention to divide an inner tube into a plurality of independent chambers radiating from the inner periphery of the interior of the tube.

A further object of the invention is the construction of an inner tube divided into endless valve controlled compartments all of which communicate with a common chamber having an air valve' connected therewith.

It is an important object of this invention to provide an inner tube of simple and effective construction wherein-a plurality of compartments communicate with a common valve through a chamber afforded by a cap vulcanized to the inner peripheral surface of the inner tube to separate from said compartments. I

Other and further important objects of this invention will be apparent from the disclosures in, the specification and drawings.

The invention (in a preferred form) is illustrated in the drawings and. hereinafter more fully described.

On the drawings:

Figure 1 is a perspective view of an nner tube embodying the principles of this invention, with a portion broken away to lllustrate the interior construction.

Figure 2 is an enlarged fragmentary detail section taken on line showing the valve mechan1sm.

Figure 3 is an enlarged detail section on line 3-3 of Figure 2 with the tube dlsposed within a tire casing.

more particularly the chamber 5 formed by said cap.

said valve 2 --2 of Figure 1 I Figure 4 is an enlarged fragmentary detail section of the valve mechanisms for infiatmg thevarious tube chambe'rs.

As shown on the drawings:

The reference characterli'indicates a tire casing having disposed therein an improved inner tube of this invention. The inner tube comprises an endless rubber-tube 2, to l which is attached in'the regular manner an. air supply valve 3. Vulcanized or otherwise'integrally secured on the interior of the tube 2 is a curved circular cap 4, whichendloses the inner part of the valve 3 within The interior of the tube 2 is divided into a plurality of endless chambers or compartments 6 by means of a plurality of endless partitions or webs 7. The partitions 7 are arranged in fan shaped relation within the tube 2 radiating from the inner periphery of the tube. The cap 4 is provided with a. plurality of air inlet openings or ports 8, one for each of said compartments Mounted within each compartment 6 upon the cap 4 is a flap valve 9 adapted to be closed by the pressure of the air within the compartment to prevent escape of air therefrom. I

When air is pumped through the valve 3 it passes throughtlie tube opening 10 into the common air supply chamber 5 formed between the inner surface of the tube 2 and the cap {L The compressed air in the chamber 5 forces the flap valves 9 open, therebypermitting air from the chamber 5 to flow through the air ports 8 into the various compartments 6' at the same time. As soon as the pressure of the air in the comparttube 2 will still be fit for use, since the remaining compartments will expand sufficiently to take up the space of the punctured compartment.

The partitions 7 are of different widths,. as illustrated in Figure 3, and divide the inner tube 2 into a plurality of continuous compartments of-different volumes. middle compartment is the largest while those on each side of the middle compartment are proportionately smaller.

The

it em aware that numerous details of construction may be varied through a Wide rangewithout departing from the principles of this invention, and I therefore donot purpose limiting the patent granted other Wise than necessitated by the prior art.

it claim as my invention:

The combination with an inner tube of integral partitions radiating from the inner eriphery. of the tube and dividing the tube into diflerent sized compartments, an air valve connected to said tube, an integral eap over said valve on the inside of the tube provided with individual air ports communicating with each compartment, and in dividual flaps over each of said air ports on JAMES e. Moment.

Witnesses:

R. R. Mnnnnrri, Cnrmon HILL. 

